Added ARM::mls for armv6t2.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@74866 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/ARM/ARMInstrInfo.td b/lib/Target/ARM/ARMInstrInfo.td
index 408f47a6e1065ef0407d933b8c4dede10dff7eb7..1916a3bb4e66689a3589d8135021e25f7f7f46d6 100644 (file)
--- a/lib/Target/ARM/ARMInstrInfo.td
+++ b/lib/Target/ARM/ARMInstrInfo.td
@@ -93,6 +93,7 @@ def ARMeh_sjlj_setjmp: SDNode<"ARMISD::EH_SJLJ_SETJMP", SDT_ARMEH_SJLJ_Setjmp>;
 def HasV5T    : Predicate<"Subtarget->hasV5TOps()">;
 def HasV5TE   : Predicate<"Subtarget->hasV5TEOps()">;
 def HasV6     : Predicate<"Subtarget->hasV6Ops()">;
+def HasV6T2   : Predicate<"Subtarget->hasV6T2Ops()">;
 def HasV7     : Predicate<"Subtarget->hasV7Ops()">;
 def HasVFP2   : Predicate<"Subtarget->hasVFP2()">;
 def HasVFP3   : Predicate<"Subtarget->hasVFP3()">;
@@ -1019,6 +1020,11 @@ def MLA   : AsMul1I<0b0000001, (outs GPR:$dst), (ins GPR:$a, GPR:$b, GPR:$c),
                     "mla", " $dst, $a, $b, $c",
                    [(set GPR:$dst, (add (mul GPR:$a, GPR:$b), GPR:$c))]>;
 
+def MLS   : AMul1I <0b0000011, (outs GPR:$dst), (ins GPR:$a, GPR:$b, GPR:$c),
+                    "mls", " $dst, $a, $b, $c",
+                   [(set GPR:$dst, (sub GPR:$c, (mul GPR:$a, GPR:$b)))]>,
+                   Requires<[IsARM, HasV6T2]>;
+
 // Extra precision multiplies with low / high results
 let neverHasSideEffects = 1 in {
 let isCommutable = 1 in {

diff --git a/test/CodeGen/ARM/mls.ll b/test/CodeGen/ARM/mls.ll
new file mode 100644 (file)
index 0000000..fd3a7b6
--- /dev/null
+++ b/test/CodeGen/ARM/mls.ll
@@ -0,0 +1,14 @@
+; RUN: llvm-as < %s | llc -march=arm -mattr=+v6t2 | grep {mls\\W*r\[0-9\],\\W*r\[0-9\],\\W*r\[0-9\],\\W*r\[0-9\]} | count 1
+
+define i32 @f1(i32 %a, i32 %b, i32 %c) {
+    %tmp1 = mul i32 %a, %b
+    %tmp2 = sub i32 %c, %tmp1
+    ret i32 %tmp2
+}
+
+; sub doesn't commute, so no mls for this one
+define i32 @f2(i32 %a, i32 %b, i32 %c) {
+    %tmp1 = mul i32 %a, %b
+    %tmp2 = sub i32 %tmp1, %c
+    ret i32 %tmp2
+}